3 3/4" X 4 7/8" (94mm X 124mm)

(side ear)  / 5092

{Suisse Langenthal}

Picture courtesy Bob Berry

3 5/8" X 4 3/4" (92mm X 121mm)

(skirt inkstamp) 

{Suisse Langenthal}

Picture courtesy Bob Berry

3 3/4" X 5" (92mm X 127mm)

(skirt incuse)  / 5092

{Suisse Langenthal}

Picture courtesy Bob Berry